Overview
- NASA said the SLS/Orion stack could depart the Vehicle Assembly Building on March 19 or 20, with a final timing decision set for March 18.
- The 4‑mile trip to Launch Pad 39B will take up to roughly 12 hours on the crawler‑transporter, and the agency plans live coverage of the move.
- Managers say either rollout date preserves an April 1 launch attempt, with additional opportunities through April 6 and April 30.
- Engineers recently swapped an electrical harness linked to the core stage flight‑termination system and completed related closeout work in the VAB.
- Earlier February issues— a liquid hydrogen leak and a helium flow interruption—prompted repairs and checks that led to a tentative April target after a flight readiness review.